Settlement Prediction Method of Bridge Pile Foundation on Soft Soil Foundation Based on Hyperbolic Method

Abstract

In order to improve the fitting degree between the predicted value and the measured value of pile foundation settlement of bridge on soft soil foundation, a method of pile foundation settlement prediction of bridge on soft soil foundation based on hyperbola method is proposed. According to the deformation mechanism of soft soil foundation, the deformation process of soft soil foundation is analyzed from three stages: plastic elastic deformation, uneven deformation and creep; According to the settlement deformation of soft soil foundation, the settlement development process of soft soil foundation under the action of bridge pile is studied from three stages of instantaneous settlement, primary consolidation settlement and secondary consolidation settlement, and the final settlement of foundation is calculated; In terms of time, the soft soil foundation is divided into two parts: construction period settlement and post construction settlement, and the development time of foundation settlement is calculated; The settlement of bridge pile foundation on soft soil foundation is predicted by hyperbolic prediction equation and hyperbolic fitting method. Experimental results: the fitting degree of the settlement time curve between the predicted settlement value and the measured settlement value of the bridge pile foundation is very high, and the error is mostly within 1%, the maximum is not more than 3%, which has high applicability and reliability.